Magnetite rock specimen from mining and quarrying industries. Magnetite is a mineral and one of the main iron ores. With the chemical formula Fe3O4, it is one of the oxides of iron.

Magnetite rock specimen from mining and quarrying industries. Magnetite is a mineral and one of the main iron ores. With the chemical formula Fe3O4, it is one of the oxides of iron. - 85839281

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